#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define rep(i, a, b) for (int i = (a); i <= (b); i++)
#define per(i, a, b) for (int i = (a); i >= (b); i--)
#define endl '\n'
const int N = 1e6 + 5;

int n, m;
int a[N];
int cnt[N], num;

int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  cin >> n >> m;
  rep(i, 1, n) cin >> a[i];
  int x = 1, y = n;
  int j = 1;
  rep(i, 1, n) {
    if (++cnt[a[i]] == 1) num++;
    if (num == m) {
      while (cnt[a[j]] > 1) cnt[a[j++]]--;
      if (i - j < y - x) x = j, y = i;
    }
  }
  cout << x << ' ' << y;
  return 0;
}